It remains unclear whether the Belgian will feature for Atletico Madrid in the Champions League semi-finals despite a Uefa statement aimed to maintain the integrity of competition
The Belgium international seemed destined to sit out the clash with his parent club due to a clause in his loan deal stating that Atletico would have to pay Chelsea up to €6 million (£4.9m) if they were paired together.
However, Uefa ruled last week that such an agreement was invalid in European competition, but Cerezo remains cautious over Courtois' participation.
"I think he’ll end up playing against Chelsea, but only if we reach an agreement with them," Cerezo told reporters.
"We’re gentlemen and we observe everything we sign.
"Courtois is Chelsea’s player and we’re trying to get him on loan for another season.
"I don’t think there will be consequences from Uefa. I think he’ll play, but only with an agreement between both parties.
"If he doesn’t play, [Daniel] Aranzubia will come in."
Courtois has been a key figure for Atletico so far this season, making 47 appearances in all competitions.